Audemars Piguet Royal Oak Perpetual Calendar Watch - 26574ST.OO.1220ST.0141mm stainless steel case, 9. 5mm thick, glareproof sapphire crystal back, screw locked crown, glareproofed sapphire crystal, silver toned dial with Grande Tapisserie pattern, white gold applied hour markers, and Royal Oak hands with luminescent coating, Calibre 5134 perpetual calendar self winding movement with week indication, day, date, astronomical moon, month, leap year, hours and minutes, approximately 40 hours of power reserve, stainless steel